打印自定义数据（打印图片）

printImage({params}, callback(ret, err))

params

base64:

• 类型：字符串
• 描述：（必填项）图片base64编码，注意去掉头信息。

示例代码

var gprinter = api.require('xGprinter');
gprinter.printImage({
    base64 : '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'
});